<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>通过模糊来弱化背景</title>
        <style>
            .bg{
                position: fixed;
                width: 100vw;
                height: 100vh;
                top: 0;
                left: 0;
                background-image: url(./img/7.webp);
                background-size: cover;
                /* 毛玻璃效果 */
                filter: blur(3px) contrast(.8) brightness(.8);
            }
            /* 负责将背景变暗 */
            .overlay{
                position: fixed;
                width: 100vw;
                height: 100vh;
                top: 0;
                left: 0;
                background-color: rgba(0, 0, 0, .8);
            }
            .overlay>img{
                position: absolute;
                z-index: 1;
                top: 50%;
                left: 50%;
                transform: translate(-50%, -50%);
            }
        </style>
    </head>
    
    <body>
        <div class="bg"></div>
        <div class="overlay">
            <img src="./img/8.webp" alt="">
        </div>
    </body>
</html>